package Examples;

/*
 * TableDemo.java requires no other files.
 */

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;

/** 
 * TableDemo is just like SimpleTableDemo, except that it
 * uses a custom TableModel.
 */
public class TableDemo extends JPanel {
	private boolean DEBUG = false;

	public TableDemo() {
		super(new GridLayout(1,0));

		JTable table = new JTable(new MyTableModel());
		table.setPreferredScrollableViewportSize(new Dimension(500, 70));
		table.setFillsViewportHeight(true);

		//Create the scroll pane and add the table to it.
		JScrollPane scrollPane = new JScrollPane(table);

		//Add the scroll pane to this panel.
		add(scrollPane);
	}

	class MyTableModel extends AbstractTableModel {
		private String[] columnNames = {"First Name",
				"Last Name",
				"Sport",
				"# of Years",
		"Vegetarian"};
		private Object[][] data = {
				{"Kathy", "Smith",
					"Snowboarding", new Integer(5), new Boolean(false)},
					{"John", "Doe",
						"Rowing", new Integer(3), new Boolean(true)},
						{"Sue", "Black",
							"Knitting", new Integer(2), new Boolean(false)},
							{"Jane", "White",
								"Speed reading", new Integer(20), new Boolean(true)},
								{"Joe", "Brown",
									"Pool", new Integer(10), new Boolean(false)}
		};

		public int getColumnCount() {
			return columnNames.length;
		}

		public int getRowCount() {
			return data.length;
		}

		public String getColumnName(int col) {
			return columnNames[col];
		}

		public Object getValueAt(int row, int col) {
			return data[row][col];
		}

		/*
		 * JTable uses this method to determine the default renderer/
		 * editor for each cell.  If we didn't implement this method,
		 * then the last column would contain text ("true"/"false"),
		 * rather than a check box.
		 */
		public Class getColumnClass(int c) {
			return getValueAt(0, c).getClass();
		}

		/*
		 * Don't need to implement this method unless your table's
		 * editable.
		 */
		public boolean isCellEditable(int row, int col) {
			//Note that the data/cell address is constant,
			//no matter where the cell appears onscreen.
			if (col < 2) {
				return false;
			} else {
				return true;
			}
		}

		/*
		 * Don't need to implement this method unless your table's
		 * data can change.
		 */
		public void setValueAt(Object value, int row, int col) {
			if (DEBUG) {
				System.out.println("Setting value at " + row + "," + col
						+ " to " + value
						+ " (an instance of "
						+ value.getClass() + ")");
			}

			data[row][col] = value;
			fireTableCellUpdated(row, col);

			if (DEBUG) {
				System.out.println("New value of data:");
				printDebugData();
			}
		}

		private void printDebugData() {
			int numRows = getRowCount();
			int numCols = getColumnCount();

			for (int i=0; i < numRows; i++) {
				System.out.print("    row " + i + ":");
				for (int j=0; j < numCols; j++) {
					System.out.print("  " + data[i][j]);
				}
				System.out.println();
			}
			System.out.println("--------------------------");
		}
	}

	/**
	 * Create the GUI and show it.  For thread safety,
	 * this method should be invoked from the
	 * event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		//Create and set up the window.
		JFrame frame = new JFrame("TableDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		//Create and set up the content pane.
		TableDemo newContentPane = new TableDemo();
		newContentPane.setOpaque(true); //content panes must be opaque
		frame.setContentPane(newContentPane);

		//Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		//Schedule a job for the event-dispatching thread:
		//creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}